EPSG systems

EPSG:20822 Aratu / UTM zone 22S

Projected system (Transverse Mercator) in use: Brazil - 54°W to 48°W and Aratu. The full definition below, and conversion in one click.

System record
CodeEPSG:20822
NameAratu / UTM zone 22S
TypeProjected system — Transverse Mercator
Area of use Brazil - 54°W to 48°W and Aratu
Brazil - offshore between 54°W and 48°W, including Pelotas basin.
Bounds W -53,38° · S -35,71° · E -47,99° · N -25,01°
Countries Brazil
DatumAratu
Ellipsoid International 1924 a = 6378388 m · 1/f = 297
Base geographic system EPSG:4208 — Aratu
Unit metre (E east, N north)
Transformation to WGS 84 Aratu to WGS 84 (13) (EPSG:5051) — accuracy 1 m
ScopeOil and gas exploration and production.

Projection parameters

ParameterValueUnit
Latitude of natural origin0degree
Longitude of natural origin-51degree
Scale factor at natural origin0.9996unity
False easting500000metre
False northing10000000metre

proj4 definition

+proj=utm +zone=22 +south +ellps=intl +units=m +towgs84=-157.84,308.54,-146.6 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:20822.

WKT (ESRI format, the .prj content)

PROJCS["Aratu_UTM_Zone_22S",GEOGCS["GCS_Aratu",DATUM["D_Aratu",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",-51.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

All systems — Brazil

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.